Database

• PIG

Experimentalists

• Eva Fabro

Parent matter

Pigment Pierrerue (PIG_0176_A), bauxite

Level

from laboratory repository

Origins

natural terrestrial

Provider

Pigmenthothèque - EDYTEM

Provider reference code

Pierrerue < 160 µm – PIG_0176_A_601 (2016-025)

Local reference code

PIG_0176_A_601_Pierrerue-inf160

Body name

Earth

Terrain type

mineral surface

Place

Pierrerue, Hérault , Occitanie , France

Coordinates

System

WGS84

Position type

point

Geolocation

Point	Latitude	Longitude	Altitude
#1	43.42654°	2.97959°

Comments

in road cut

Preparation

sieved fraction

Method

crushed and sieved with a mesh of 160 µm

Storage condition

room temperature and conditions

Phase type

solid

Component type (group)

sedimentary rock (iron-sediment or ironstone)

Comments

Ferruginous pisoliths formed within ferruginous clay - Era: Mesozoic, Middle Jurassic

Shape

very fine red powder

Texture

pulverulent

Type of porosity

particulate

Density

1.25 $\pm$ 0.25 $g.cm^{-3}$

Texture

compact

Grain density

1.25 $\pm$ 0.25 $g.cm^{-3}$

Grain sizes

Grains	Size min	Size max	Size median	Size width	Size mass fraction	Grain shape
#1	0.0 ${\mu}m$	160.0 ${\mu}m$			1.0	equant

Size distribution

possibly large fraction below 50-100 µm

Size method

sieving with mesh of 160 µm

Comments

density varies with the degree of settlement

Oxides

Formula	$SiO_{2}$	$Al_{2}O_{3}$	$Fe_{2}O_{3}$	$MnO$	$MgO$	$CaO$	$Na_{2}O$	$K_{2}O$	$TiO_{2}$	$P_{2}O_{5}$
Mass fraction (%)	24.79	21.12	41.99	0.022	0.06	0.21	0.02	0.09	1.03	0.1

Oxides comments

Contain Ti (1.03% in oxide) and small impurity of Mn, Mg, Ca, Na, K, P (0.5% in oxides), fire loss: 9.2%

Number

3

Mode of mixing

homogeneous mixing

Materials

	Name	Arrangement	Mass (g)	Mass fraction	Abundance comments
	Pisoliths: Hematite with kaolinite				dominant
	Edge of the Pisoliths: kaolinite-calcite-goethite	concentrated at the edge of the pisoliths
	Alumino-ferruginous clay

Links

• Research Gate: Pigmentothèque

Publications

• Chalmin et al., 2021, Color Res. Appl., on-line, 1 - 21